Condition to check if a field is empty on a sharepoint list - trouble setting it up?

[zzyzxuk]

I've read in a few posts on the net about how I can trigger a flow to start if a Sharepoint list item is added, but it's row is empty.  I want to do this for a list of new staff, and if the 'email' column is empty, I want to kick off a mail to our IT guys to get them to create an email for them.

I've set up the 'condition' to look like this:

And in the 'condition' logic, I've included this:

When I test this though, it always assumes that this field isn't empty.    Any ideas where i'm going wrong here?

(i'm also thrown off by the fact that the dialog is structured so I always see the 'is equal to' dropdown, which doesn't feel appropriate in this case, but it seems to always be there?)

[David_MA]

You don't have any value entered on the right side of your condition. If you want to check if the field is empty using the expression you show, you need to use the expression builder and enter true on the right side of the condition. Alternatively, if you want to check that it is not empty, you will enter false on the right side of the condition.

[zzyzxuk]

Do you mean like this?:

(And can anyone tell me what that tickbox is for to the left of the magenta rectangle?  Does it need to be 'ticked' for it to be evaluated?)

[David_MA]

No. You manually typed the word "true." You need to use the expression builder to choose the true expression. When done correctly, true will be pink indicating it is an expression:

The checkboxes are used when you have multiple conditions, and you want to group the conditions to make AND/OR evaluations. Since you only have one condition, you don't need to worry about it.

[zzyzxuk]

Ah - like this?  (And is that tickbox important at all?)

[David_MA]

The checkboxes are used when you have multiple conditions, and you want to group the conditions to make AND/OR evaluations. Since you only have one condition, you don't need to worry about it.